Anemia

Although many parts of the body help make red blood cells, most of the work is done in the bone marrow. Bone marrow is the soft tissue in the center of bones that helps form all blood cells V体育ios版.

Healthy red blood cells last between 90 and 120 days. Parts of your body then remove old blood cells. A hormone called erythropoietin (EPO) made in your kidneys signals your bone marrow to make more red blood cells VSports最新版本.

Hemoglobin is the oxygen-carrying protein inside red blood cells. It gives red blood cells their color V体育平台登录. People with anemia do not have enough hemoglobin.

The body needs certain vitamins, minerals, and nutrients to make enough red blood cells VSports注册入口. Iron, vitamin B12, and folic acid are three of the most important ones. The body may not have enough of these nutrients due to:.

• Changes in the lining of the stomach or intestines that affect how well nutrients are absorbed (for example, "VSports注册入口" celiac disease)
• Poor diet
• Surgery that removes part of the stomach or intestines

Possible causes of anemia include:

• Iron deficiency
• Vitamin B12 deficiency
• Folate deficiency
• Certain medicines
• Destruction of red blood cells earlier than normal (which may be caused by immune system problems)
• Long-term (chronic) diseases such as chronic kidney disease, cancer, ulcerative colitis, or rheumatoid arthritis
• Some forms of anemia, such as thalassemia or sickle cell anemia, which can be inherited
• Pregnancy
• Problems with bone marrow such as lymphoma, leukemia, myelodysplasia, multiple myeloma, or aplastic anemia
• Slow blood loss (for example, from heavy menstrual periods or VSports最新版本 - stomach ulcers)
• Sudden heavy blood loss